/Engine/Source/Runtime/Core/Public/Compression/CompressedBuffer.h
RawOffset must be at most the raw buffer size. RawSize may be MAX_uint64 to read the whole buffer from RawOffset, and must otherwise fit within the bounds of the buffer.
An owned buffer containing the raw data, or null on error.
[FSharedBuffer](API\Runtime\Core\Memory\FSharedBuffer) Decompress ( uint64 RawOffset, uint64 RawSize )